Intangible Assets, Net - Additional Information (Detail) ¥ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2017
CNY (¥)
|
Dec. 31, 2017
USD ($)
|
Dec. 31, 2016
CNY (¥)
|
Dec. 31, 2015
CNY (¥)
|
|
| Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization of intangible assets | ¥ 6,923 | $ 1,064 | ¥ 4,558 | ¥ 5,247 |
| Minimum [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Intangible assets, estimated useful lives | 1 year 9 months | 1 year 9 months | ||
| Maximum [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Intangible assets, estimated useful lives | 15 years | 15 years | ||
| Continuing Operations [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Amortization of intangible assets | ¥ 6,923 | $ 1,064 | ¥ 4,558 | ¥ 5,247 |